Electric universal indicator



June 24, 1930. w. ALTNER ELECTRIC UNIVERSAL INDICATOR 7 Filed Dec. 21,1928 Patented June 24) 1930' Q;- I I I of rnoiroomnrnxroo f 7 v i I r715 I v intIvEnsAL-Iunmamnfl I jllnplication filed December azs 'seii njaaaroa as; images n m 10,. 1928.

This invention refers to an electric uni- On the flange of the-bearings(16) and -'versal indicator; which "may .be used'for ('17) are fixed thetwo rotatory bridge conmany differentpurposes, but always with tactpieces which carry a ring or anthe object of indicating movement'"of anynularplate of'soft iron (6), which is open kind. Onefof the mostimportant uses of at its upperend'and provided with a nuin the indicatoris asa secondary clock, hut'it ber of-teeth on the inside at'both sides.4 maybe used for instance for indicating-the Four metal screws keep thebridge pieces level of liquids atdistance; as indicator of fastened tothering ofsoft iron, so that this the position of certain valves whichit v is last will rot-ate around'the toothed wheel 7 uesired to watch,in anyjkind of installameans ofsaid b id Pieces N1 tions.- A 1 (3)-and(12) are .staybolts of insulated The apparatus. maybe used forindicatingmaterial, which are screwed into the-plate the strength or the'directionof thewind -14L) of the'housing; Each of these stay either onboard ships' or at aviation fields. bolts carries a set-screw forregulating the I I 1. It may beus'ed also for'countingpiecegoods tensionof; a' spring. This sprin is con- 155 at long distance andas 1 an indicator in a nected at its other end to a stop of insulating central ofliceofthe movement of vehicles as material on the circuinference of the irontrains, tramways,'etc.l ring. and (1O) "are brass bolts'whichi- Thenumber of movements which may keep the plates of the housing at theproper '2 beindicated by the 'presentinventionis distanceonefrom-theother, andin a firm l unlimited. t I manner. I u v v 'Theapparatus is of a very simple con- The inferior'bolts (7 and (10) eachstruction and willfwork'iwith' any kind ofv carry a set screw by meansof which-the current, Thejcostfof operation is very small movement of"the iron ring is limited; I

- 25 andthere is very little "friction in all the Firmly secured to theiron ring (6) in fthe parts of the apparatus wherefore.itwillflast lowerpart isthe S3001 (26); One end of I very long, as a matter of factforlifetime. the spool is soldere to a spiral spring while In thespecification I am giving some eziainthe "other end is. soldered toanother spiral ples' of'the range of use of the apparatus spring; Thetwosu-perior spoolsI (2) and v 530 but it is to be understood that myinvention (13) are firmly secured to theplate (14) of is not limited'tothose uses and that I claim""the'housing: The extremes of theiron ringthe use of the apparatus for the recording of enter into the two.supeirionjspoolsf andiform any movement. in this manner; the iron corefor the solenoid.

In the accompanying drawing the appais a source f-Of current. (24) andv35 ratus is shown in'cross-section in; both Fig. are] earthconnections; (4) and (11) e5 1 and Fig. 2. I are insulated stopsproyided on the cir- "Referringto the drawing: I cumference oftheironring y (14:) and (19) are two metalplates form- The function of theapparatusisfa's foling thehousingof the apparatus. These .lows: I I V II .40 plates are of brass or any other non-maghen the switch-(22) isconnected to the I netic metal. In these plates are provided .contactatthe left, current w ll flow from the two "bronze bearings (16) and (17),in the source through the switch tothe spool I which the shaft (8)rotates. On said shaft (2) from there through the 'set screw at (8) isfixed the toothed wheel or disc (9). (12) thr0ugh the spring to thespool (26), 1 1

' 45 At one end of the shaft is placed the brake through the'spring'a'nd' set-screw at to pulley (15) which as the toothed wheel isearth connection (25),- and from there connected firmly to the shaft, Onthe other through earth to earth connect on and end of the shaft isfirmly fixed the needle back to'the source. By means of the current(18). .The toothed, wheel. is made of. soft the spool (2) will attractthe iron core in- 50 iron; r

Wardly until the-insulated stop (11) touches set screw at At the sametime a magnetic circuit will be formed by the spool- (26) Y The teeth ofthe iron ring orannular plate are in frontof therteeth of the toothedwheel which they hold fast by magnetism.

Ifnow,1as above describedpthe iron ring turnsby means of the magnetlsmof the spool (2) the toothed wheel necessarily will also "turn.

jmagnetic and thespringat ('12) will draw If the circuit is broken atthe switch (22),sthe'spools will no longer be the iron ring backrto itsoriginal position,

but as there is'no magnetism it'will not take the toothed (wheel along.The distanceibetween the teethfo'f the toothedwheel and the teethiof theiron ring is made as small as possible in order to; avoid too-muchintermejdiate loss inthemagnetic power lines. The

distance between the insulated stop (11 and set screw (10) at one sideand'between the insulated stop (4L) and the set screw (7 at thetoothedWheel. V I r 1 operation of i [connection will turn thetoothedwheel one the other side is made such that it will correspond tothedistance between two teeth on Thus the iron 7 ring in ;,one

s tooth, and: when the circuit is :broken the iron ringwill return toits original position ,alone, and the teeth of the samewill again be infrontof the teeth of the toothedwheel.

' Inorderto obtain this, it will be necessary L that both springs oftheiron ring be of the 3 same tension'l' p a The small residue of'magnet- 1sm,wh1ch' might remain in the iron when J the circuit is'broken could eventuallyinake the toothed wheel s retreat a little, andin i order to avoidthis', the shaft carries a brake f p p I l By placingthe switch (22) on the contact I to the right -(Fig.- 1')- the course ofthecurpulley In a slot in said pulley works the brake, cord lwhosetension may be regu-' lated by means of a spring and a set screw.Instead of this arrangement others may .ofcourse be jused, but this" isfar the jcheapest.

, Thebra'ke might be effected by magnets as hin theelectric meters.

, rent would bethei following:

i The current comes from the 'sourcef(23),

through the switch (22) .to the'c'ontact to the right, from thereto thespool (13). Leaving this goes through set screw and spring at(12)"to'the spool (26) from here it goes "1 through theset screw andspring at to earth connection (25), and from there through the earth to'earth connection (25) V and finally'back to the source. By this the r vspool (13).;will attract the iron ring inwardly until the insulated stop(4:) engages the set'screw (7),

j magnetism obtained in the spool (26),will hold fast the 'teeth of thetoothed wheel 'which' are precisely in front, ,of the teeth of the ironring,vso that the iron ring turns At the same time the in the directionof the needle of arclock 'a' distance corresponding to one tooth;

When the circuit'is broken by the switch (22) the spools will no longerbe magnetic and the iron ring will go back to its original positionbymeans of'the spring at (3), withoutcarryin'gthe toothed wheelr QConsequently" the toothed wheel has turned a distance equivalent to onetooth, and pre-V 'cisely in'opposite directions to that of the firstdescribed case. 7

Having thus described my whatI claim'is:- V i g I V V In an electricindicator, the combination invention,

with main'supporting plates of non-magnetic materialandmeans forsecuring the same in superimposed relation; of, a shaft centrallyjournaled in said plates and; a

toothed disc of magnetic metal mounted on said shaftforrotation'betweensaid plates;

an annular ring and means for rigidly secur-I 'ing the same to theshaft, said ring having opposite portions of its inner periphery pro-Vided with teeth in magnetic relation to said toothed disc, said discbeing adapted for intermittent rotation in unison with said annularring;an electro-magnetic coil rigidly said ring having its opposite portionout" awayto form solenoid'cores tadjustabl stop means and means forsecuring the sameto the supporting plates; insulated'lugs opposecured toone portionof the annular ring,

sitelylocate'd on the periphery of the annu larring, said lugs beingalternately engageable withsaid stop meansyand solenoids se'-, ouredtoone of the supporting plates and in circuit with the electromagneticcoil, said solenoids being adapted whenalternately ens ergized toe'lfect'solective rotation ofsaid 1 5 annular ring within the limitsdefined by the said stop means.

In testimony whel'ofjl e fi lecl iny,

signature.

' W3 ALTSERQ

